Which of the following molecular species has unpaired electrons(s) ? .

Options

A. `N_(2)`
B. `F_(2)`
C. `O_(2)^(-)`
D. `O_(2)^(2)`

Answer

c

Explanation

`sigma 1s^(2), sigma ** 1s^(2), sigma 2s^(2), sigma** 2s^(2), sigma p_(x)^(2) pi 2p_(y)^(2), pi 2p_(z)^(2), pi ** 2p_(y)^(2) pi ** 2p_(z)^(1)`
Hence , `O_(2)^(-)` has unpaired electron.